Assuming the house is parallel to the ground, your triangle is made up by the house, the ground, and the ladder. Using sin(x) = opposite/hypotenuse on the angle 70 degrees, you would have sin(70) = 20/x (because 20 is the side opposite of the angle connecting the ladder and the ground) --> simplify sin(70) * x = 20 --> x = 20 / sin(70 --> substitute (and make sure your calculator in in degrees) x= 21. 284
We know (Ohm second law) that where k inlcudes the rest of the parameters (material, lenght). In our situation we have k= . The moment the diameter becomes 8mm R becomes
